Shell evolution of stable N=50-56 Zr and Mo nuclei with respect to low-lying octupole excitations

E. T. Gregor, Marcus Scheck, R. Chapman, L. P. Gaffney, J. Keatings, K.R. Mashtakov, David O'Donnell, J. F. Smith, Pietro Spagnoletti, M. Thuerauf, V. Werner, Callum Wiseman

Research output: Contribution to journalArticle

Abstract

For the N = 50-56 zirconium (Z = 40) and molybdenum (Z = 42) isotopes, the evolution of subshells is evaluated by extracting the effective single-particle energies from available particle-transfer data. The extracted systematic evolution of neutron subshells and the systematics of the excitation energy of the octupole phonons provide evidence for type-II shape coexistence in the Zr isotopes. Employing a simplistic approach, the relative effective single-particle energies are used to estimate whether the formation of low-lying octupole-isovector excitations is possible at the proposed energies. The results raise doubts about this assignment.
Original languageEnglish
Article number50
JournalEUROPEAN PHYSICAL JOURNAL A
Volume53
DOIs
Publication statusPublished - 15 Mar 2017

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particle energy
isotopes
nuclei
excitation
molybdenum
phonons
neutrons
energy
estimates

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Gregor, E. T. ; Scheck, Marcus ; Chapman, R. ; Gaffney, L. P. ; Keatings, J. ; Mashtakov, K.R. ; O'Donnell, David ; Smith, J. F. ; Spagnoletti, Pietro ; Thuerauf, M. ; Werner, V. ; Wiseman, Callum. / Shell evolution of stable N=50-56 Zr and Mo nuclei with respect to low-lying octupole excitations. In: EUROPEAN PHYSICAL JOURNAL A. 2017 ; Vol. 53.
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title = "Shell evolution of stable N=50-56 Zr and Mo nuclei with respect to low-lying octupole excitations",
abstract = "For the N = 50-56 zirconium (Z = 40) and molybdenum (Z = 42) isotopes, the evolution of subshells is evaluated by extracting the effective single-particle energies from available particle-transfer data. The extracted systematic evolution of neutron subshells and the systematics of the excitation energy of the octupole phonons provide evidence for type-II shape coexistence in the Zr isotopes. Employing a simplistic approach, the relative effective single-particle energies are used to estimate whether the formation of low-lying octupole-isovector excitations is possible at the proposed energies. The results raise doubts about this assignment.",
author = "Gregor, {E. T.} and Marcus Scheck and R. Chapman and Gaffney, {L. P.} and J. Keatings and K.R. Mashtakov and David O'Donnell and Smith, {J. F.} and Pietro Spagnoletti and M. Thuerauf and V. Werner and Callum Wiseman",
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day = "15",
doi = "10.1140/epja/i2017-12224-7",
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Gregor, ET, Scheck, M, Chapman, R, Gaffney, LP, Keatings, J, Mashtakov, KR, O'Donnell, D, Smith, JF, Spagnoletti, P, Thuerauf, M, Werner, V & Wiseman, C 2017, 'Shell evolution of stable N=50-56 Zr and Mo nuclei with respect to low-lying octupole excitations' EUROPEAN PHYSICAL JOURNAL A, vol. 53, 50. https://doi.org/10.1140/epja/i2017-12224-7

Shell evolution of stable N=50-56 Zr and Mo nuclei with respect to low-lying octupole excitations. / Gregor, E. T.; Scheck, Marcus; Chapman, R.; Gaffney, L. P.; Keatings, J.; Mashtakov, K.R.; O'Donnell, David; Smith, J. F. ; Spagnoletti, Pietro; Thuerauf, M.; Werner, V.; Wiseman, Callum.

In: EUROPEAN PHYSICAL JOURNAL A, Vol. 53, 50, 15.03.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Shell evolution of stable N=50-56 Zr and Mo nuclei with respect to low-lying octupole excitations

AU - Gregor, E. T.

AU - Scheck, Marcus

AU - Chapman, R.

AU - Gaffney, L. P.

AU - Keatings, J.

AU - Mashtakov, K.R.

AU - O'Donnell, David

AU - Smith, J. F.

AU - Spagnoletti, Pietro

AU - Thuerauf, M.

AU - Werner, V.

AU - Wiseman, Callum

PY - 2017/3/15

Y1 - 2017/3/15

N2 - For the N = 50-56 zirconium (Z = 40) and molybdenum (Z = 42) isotopes, the evolution of subshells is evaluated by extracting the effective single-particle energies from available particle-transfer data. The extracted systematic evolution of neutron subshells and the systematics of the excitation energy of the octupole phonons provide evidence for type-II shape coexistence in the Zr isotopes. Employing a simplistic approach, the relative effective single-particle energies are used to estimate whether the formation of low-lying octupole-isovector excitations is possible at the proposed energies. The results raise doubts about this assignment.

AB - For the N = 50-56 zirconium (Z = 40) and molybdenum (Z = 42) isotopes, the evolution of subshells is evaluated by extracting the effective single-particle energies from available particle-transfer data. The extracted systematic evolution of neutron subshells and the systematics of the excitation energy of the octupole phonons provide evidence for type-II shape coexistence in the Zr isotopes. Employing a simplistic approach, the relative effective single-particle energies are used to estimate whether the formation of low-lying octupole-isovector excitations is possible at the proposed energies. The results raise doubts about this assignment.

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DO - 10.1140/epja/i2017-12224-7

M3 - Article

VL - 53

JO - The European Physical Journal A

JF - The European Physical Journal A

SN - 1434-6001

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